@Jarred Tresize
Hi,
Windows 10 Enterprise Subscription Activation (EA or MPSA) requires Windows 10 Pro, version 1703 or later.
It is suggested that you can disconnect the Auzre Domain, return to Pro version, then run the command slmgr.vbs -dli to view the activation statue. We have to make sure that the pro version is activated.
You could start here with the Switch Plans Wizard:
https://learn.microsoft.com/en-us/microsoft-365/commerce/subscriptions/switch-to-a-different-plan?redirectSourcePath=%252fen-us%252farticle%252fSwitch-Office-365-plans-using-the-switch-plans-wizard-2e5ad347-a6ab-4e7a-a9df-4663fb0a09dc&view=o365-worldwide
If you're unsure about what the experience will be like just set up a test user, or pick one user, and make the change and work it all out.
Hope above information can help you.
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